Page 65 of 354

62 Restraint systems
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Unfastening of seat belts
Push the release button (3) in the belt buckle (2).
Allow t he retractor to completely rewind t he seat belt by 
guiding the latch plate (1).
Operation
The inertia reel stops the belt from unwinding during 
sudden vehicle stops or when quickly pulling on the 
belt. The locking function of the reel may be checked by 
quickly pulling out the belt.
Wa r n i n g !
USE SEAT BELTS PROPERLY.• Seat belts can only work when used properly. 
Never wear seat belts in any other way than as 
described in this section, as that could result 
in serious injuries in case of an accident.• Each occupant should wear their seat belt at all 
times, because seat belts help reduce the 
likelihood of and potential severity of injuries 
in accidents, including rollovers. The 
integrated restraint system includes SRS 
(driver airbag, front passenger airbag, front 
and rear door mounted side impact airbags, 
head protection window curtain airbags for 
side windows), ETD (seat belt Emergency 
Tensioning Device ), and front seat knee 
bolsters. The system is designed to enhance the 
protection offered to properly belted occupants 
in certain frontal (front airbags) and side (side 
impact and window curtain airbags) impacts 
which exceed preset deployment thresholds. 
     
        
        Page 68 of 354

65 Restraint systems
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index BabySmart
TM airbag deactivation system
Special BabySmart
TM compatible child seats, designed 
for use with the Mercedes-Benz system and available at 
any authorized Mercedes-Benz Center are required for 
use with the BabySmart
TM airbag deactivation system.
With the special child seat properly installed, the 
passenger front airbag will not deploy. The 7 
indicator lamp located on the center console will be 
illuminated, except with electronic key removed or in 
steering lock position 0. The system does not deactivate 
the door mounted side impact airbag and the window 
airbag.
Self-test BabySmart
TM
without special child seat installed
After turning electronic key in steering lock to position 
1 or 2, the 7 indicator lamp located on the center 
console comes on for approximately 6 seconds and then 
extinguishes.
If the indicator lamp should not come on or is 
continuously lit, the system is not functioning. You must 
see an authorized Mercedes-Benz Center before seating 
any child on the front passenger seat.BabySmart
TM is a trademark of Siemens Automotive Corp.
Wa r n i n g !
The BabySmart
TM airbag deactivation system will 
ONLY work with a special child seat designed to 
operate with it. It will not work with child seats 
which are not BabySmart
TM compatible.
Never place anything between seat cushion and 
child seat (e.g. pillow), since it reduces the 
effectiveness of the deactivation system.The bottom 
of the child seat must make full contact with the 
passenger seat cushion. An incorrectly mounted 
child seat could cause injuries to the child in case 
of ar accident instead of protecting the child.Follow the manufacturer’s instructions for 
installation of special child seats.When using a BabySmart
TM compatible child seat 
on the front passenger seat, the front passenger 
airbag will not deploy only if the 7 indicator 
lamp remains illuminated.
Please be sure to check the indicator every time 
you use the special system child seat.
Should the light go out while the restraint is 
installed, please check installation. If the light 
remains out, do not use the BabySmart
TM restraint 
to transport children on the front passenger seat 
until the system has been repaired. 
     
        
        Page 71 of 354

68 Restraint systems
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Airbags
1Driver airbag
2Front passenger airbagThe most effective occupant restraint system yet 
developed for use in production vehicles is the seat belt. 
In some cases, however, the protective effect of a seat 
belt can be further enhanced by an airbag.
In conjunction with wearing the seat belts, the driver 
and front passenger airbags can provide increased 
protection for the driver and front passenger in certain 
frontal impacts exceeding preset thresholds.
Door mounted side impact and head protection window 
curtain airbags can provide increased protection to 
belted outboard occupants on the impacted side of the 
vehicle in side impacts exceeding its preset threshold.
The operational readiness of the airbag system is 
verified by the indicator lamp SRS in the instrument 
cluster when turning the electronic key in steering lock 
to position 1 or 2. If no fault is detected, the lamp will go 
out after approximately 4 seconds; after the lamp goes 
out, the system continues to monitor the components 
and circuitry of the airbag system and will indicate a 
malfunction by coming on again. If the lamp does not 
come on at all or if it fails to extinguish after 
approximately 4 seconds or if it comes on thereafter, a 
malfunction in the system has been detected.
2
1
P91.60-2248-27 
     
        
        Page 84 of 354
81 Steering wheel adjustment
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Steering wheel adjustment
Turn electronic key in steering lock to position 1 or 2 
(with the driver’s or front passenger’s door open, the 
steering wheel can also be operated with the electronic 
key removed or in steering lock position 0).
To lengthen or shorten the steering column, push switch 
forward or backward.
To raise or lower steering wheel, push switch up or 
down.Note:
The steering wheel position can be stored in memory 
together with the seat / head restraint / exterior rear 
view mirror positions, see page 45.
P46.00-2010-26
Wa r n i n g !
Do not adjust the steering wheel while driving. 
Adjusting the steering wheel while driving could 
cause the driver to lose control of the vehicle. 
     
        
        Page 92 of 354
89 Instrument cluster
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Activating instrument cluster display
The instrument cluster is activated by:
•Opening the door.
•Pressing buttonJ,VorWon the instrument 
cluster.
•Turning the electronic key in steering lock to 
position 1 or 2.
•Switching on the exterior lamps.
Instrument cluster illumination
The instrument cluster illumination is dimmed or 
brightened automatically to suit daylight lighting 
conditions.
The instrument cluster illumination will also be 
adjusted when the vehicle’s exterior lamps are switched 
on.
1 The instrument cluster is activated for approximately 30 seconds.
Instrument cluster illumination
Activating the instrument cluster.
PressVorWbutton to vary intensity of instrument 
lamps. 
     
        
        Page 157 of 354
154 Interior equipment
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Power windows
Power window switches located on center console
Switches for:
1left, front
2left, rear
3right, front
4right, rear
5Switch for rear door window overridePower window switches located in rear doors
6Individual switches (rear doors)
Turn electronic key in steering lock to position 1 or 2.
Press switch in to resistance point:
kto open
jto close
Release switch when window is in desired position.
152
43
P54.25-2119-26 
     
        
        Page 158 of 354

155 Interior equipment
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Express opening and closing
Press switch k or j past resistance point and 
release — window opens or closes completely. 
To interrupt procedure, briefly press k or j.
If the upward movement of the window is blocked 
during the closing procedure, the window will stop and 
open slightly. 
When pressing and holding the switch j to close the 
window, and upward movement of the window is 
blocked by some obstruction including but not limited to 
arms, hands, fingers etc., the automatic reversal will not 
operate.Blocking of rear door window operation
If no operation of the rear windows by switch (6) (for 
instance by children) is desired, slide override 
switch (5) to right, symbol N becomes visible, see 
page 154.
Wa r n i n g !
When leaving the vehicle, always remove the 
electronic key from the steering lock and lock the 
vehicle. Do not leave children unattended in the 
vehicle, or with access to an unlocked vehicle. 
Unsupervised use of vehicle equipment can cause 
an accident and/or serious personal injury.
Wa r n i n g !
When closing the windows, be sure that there is no 
danger of anyone being harmed by the closing 
procedure.The closing of the door windows can be 
immediately halted by releasing the switch or, if 
switch was pressed past the resistance point and 
released, by either pressing switch j or k.
If the window encounters an obstruction that 
blocks its path in a circumstance where you 
pressed the switch past the resistance point and 
released it to close the window, the automatic 
reversal function will stop the window and open it 
slightly.  
     
        
        Page 162 of 354

159 Interior equipment
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Interior lighting
1Automatic interior lighting
Press once and the interior lighting is activated.
Interiors lamps are switched on, and off (soft fade) 
delayed, when unlocking or locking the vehicle, or 
when opening or closing a door. However, there will 
be no (soft fade) delay when the electronic key is in 
steering lock position 2.
Press again and interior lamps remain switched off, 
even when centrally unlocking or opening a door.2Press to switch interior and reading lamps on or off.
3Press to switch rear passenger compartment lamp 
(including reading lamps) on or off.
4Press to switch reading lamp on or off.
Notes:
To prevent the vehicle battery from being discharged, 
with reading lamps switched on manually and 
electronic key in steering lock position 0 or removed, 
the reading lamps go out after approximately 30 
minutes.
Entrance lamps, exit lamps in doors
The lamps are switched on and off by the door contact 
switches.
Notes:
To prevent the vehicle battery from being discharged, 
with doors open all interior lamps go out after 
approximately 5 minutes.